Charlie Chan
1.8K posts

Charlie Chan
@CharlieChanZeng
Investor | Trader | Solopreneur - Building Carepital. Newsletter ↓
Free weekly investing research Katılım Ocak 2020
255 Takip Edilen175 Takipçiler

"Investors are parasites."
That sentence makes sense in a hunter-gatherer economy.
It breaks in a capital economy.
The instinct never updated.
Li Lu (李录), who runs Charlie Munger's family office at Himalaya Capital, laid this out cleanly. Threading it because it's the sharpest mental model I've heard for it in a while.

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Everyone says AI removes bottlenecks.
It doesn't. It moves the bottleneck. Into your skull.
How much you can hold and connect is the new ceiling.
❌You re-debate decisions you've already made.
❌You forget the numbers from last week's filing.
❌You learn a tool, then 3 days later can't reconstruct how it connected to the others.
The unlock isn't more AI. It's a second brain.
✔️Aligned to you.
✔️Paired with AI.
✔️To hold the numbers you read.
✔️To capture thoughts as they happen.
✔️Not to decide for you, but to remember what you decided and why.
That's the layer that lets AI actually amplify you.
Without it, AI is just faster typing.

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Yesterday I posted a demo of an IBKR portfolio tool I built with Claude Code.
Today's flex: I didn't record that demo. Claude Code did.
One prompt. It opened PowerShell on my recording monitor, ran the script, captured the screen, annotated the interesting frames, exported the mp4.
No OBS. No video editor. No "let me set up the scene first."
The thing people miss about Claude Code is it's not a coding assistant. It's an agent with hands. It can drive your actual computer - apps, terminals, files, recordings - the same way you would.
The tool I built was what I want. The fact that the demo recorded itself is the bonus story.
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Want weekly(ish) field notes from building AI-leveraged systems? The tools I tried, the systems I shipped or killed, and the ideas worth borrowing. Subscribe: charliechan.me
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I run a portfolio with real leverage - synthetic options + LEAPs short puts. Which means my actual exposure is way more than just my stock positions.
IBKR gives you no single view of what that looks like. So I built one.
One terminal command that pulls live from TWS and breaks it all down - stocks at market value, cash secured in puts, options combos with max loss. Grand total in USD + SGD.
Here it is running.
Built with Claude Code. Took about 15 mins.
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Built a terminal command today that tells me exactly how exposed I am - in one second.
Running a portfolio of stocks + options is messy. IBKR doesn't give you one clean view of:
- How much cash is actually tied up in cash-secured puts
- What your max loss looks like across all positions
- Whether you're overextended or have room to add
Before: clicking around 3 different IBKR screens, mentally adding it all up.
Now: one command. Stocks at market value, puts with cash secured and max loss, options combos broken out - all in USD and SGD.
Took Claude Code 15 mins to build. The bar for "tools I can build for my exact workflow" just keeps dropping.

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I break down market-moving events into actionable frameworks for individual investors. Join before the next one hits: carepital.com/newsletter
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